BASIS OF PRESENTATION, ORGANIZATION AND RECENT EVENTS (Details)	1 Months Ended	3 Months Ended			6 Months Ended
	Mar. 31, 2020	Jun. 30, 2020 USD ($) state	Mar. 31, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) state dialysisClinic segment patient	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of dialysis clinics owned and operated | dialysisClinic					251
Number of patients company treats | patient					17,356
Number of states in which company operates in | state		27			27
Number of reportable segments | segment					1
Asset impairment charges		$ 0	$ 0
Proceeds from grant fund, CARES Act					$ 26,595,000
Amounts utilized under the grant funds, CARES Act					9,800,000
Other income, CARES Act		1,474,000		$ 0	1,474,000	$ 0
Revenue received from temporary suspension of automatic 2% reduction of medicare program payments, CARES Act		1,123,000
Medicare accelerated and advance payment program, payment request	100.00%
Medicare accelerated and advance payment program, payment request period	3 months
Medicare accelerated and advance payment program, payment commencement, period post payment issuance	120 days
Deferred revenue, advanced payments from Centers for Medicare and Medicaid Services		83,193,000			83,193,000		$ 0
COVID-19
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Additional operating expenses incurred related to COVID-19		7,310,000			8,612,000
Other income, CARES Act		1,474,000			1,474,000
Operating expenses offset by grant funds, CARES Act		$ 8,368,000			$ 8,368,000
American Renal Holdings Intermediate Company, LLC
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage ownership of subsidiary		100.00%			100.00%
Percentage ownership of parent		100.00%			100.00%